1 Gr. and + Gr. rouletted as correctly franked always with clear blue single circle. BREMERHAVEN 1.4.69 on small-format cover with routing indicator "via Ritzbüttel" with appropriate on the back single circle. In black and forwarding postage note to Heligoland, cover left with longer, pasted opening crack, otherwise in good total maintenance, very scarce Old German States destination!